I can't imagine how much time it took to make this pack.
The only thing I know that's missing is this:
http://info.sonicretro.org/Somari
(An NES bootleg)
I don't know if you're still working on this or not, but if you for some reason are, then there you go.

After doing a bit looking, it does have a lot of the classical NES titles that a lot of us remember. Who ever made this RAR file also did the right thing by putting the files in the places they belong in. (PD files in a PD folder, etc.) It's also separated by country as well. It also includes Pirated, Hacked, Unlicensed, even Translated titles.

Now let me explain this a bit. If you can't find the title, you may need to look under the "World" folder as that includes titles that is world known, such as Hogan's Alley, Excite Bike, Duck Hunt, Mario Bros., Popeye, & Gyromite, to name a few.

My only concern is that there is no "Japanese" titles, let alone folder. So, although it does have a very good collection of NES titles, just curious why it does not include Japanese titles. (Yes, I am aware that a lot of titles are translated in Japan as well as USA, but there are also a ton of titles that are not in any other country other than Japan. Yes, the "Translated" folder has Japanese titles, but some of us prefer the original translations of the game. Mainly because sometimes the "translated" titles have bugs due to the translation, and sometimes crash the game.)